107
YORK INTERNATIONAL
FORM 100.50-NOM1 (604)
7
Purge Schedule
This is the programmable time of day to start Purge
for each day.
Purge OAT High Limit
This programmable temperature is the upper limit for
Purge using 100% outdoor air.
Purge OAT Low Limit
This programmable temperature is the lower limit for
Purge using 100% outdoor air.
Smoke Purge Mode
The smoke purge setting enables/disables the Smoke
Purge function and tells the control what Smoke Purge
control sequence to follow. The setting range is 0 – 5.
A “0” setting tells the control to ignore the Smoke
Purge input and do nothing (Smoke Purge disabled).
A setting of 1 – 5 tells the control which one of
Þ
ve
smoke purge control sequences to follow when the
Smoke Purge in put is active. Smoke Purge con
Þ
gura-
tion options are detailed in the section on Sequence
Operation.
Internal Clk/Sched
This setting tells the control to use the Internal
Time Clock and Schedule built into the controller
for all sched ul ing functions. When this function is
set to ON, all Occupied/Unoccupied commands and
Morning Warm Up commands received over a Net-
work (BAS) will be ignored. Unoccupied Override
commands via Space Sensors and the hard wired
Occupied/Unoccupied in put will take priority over
the internal scheduling.
Weekly Schedule
The schedule for time-programmed operation of the
unit is entered for all days of the week plus a holiday
schedule. One start and stop time is allowed.
Holiday Schedule
Holiday dates are entered into the Holiday Schedule
for use in time-programmed operation. Up to 16 dates
are allowed. Dates are assumed to be for the current
year.
CONFIGURATION KEY PARAMETERS
These setpoints are intended to be programmed
at the factory and should not be changed by fi eld
personnel.
GENERAL
Unit Type
This tells the control that it is controlling one of the
three selectable rooftop unit type options:
• Constant Volume
• Variable Air Volume
• Flexsys
Dirty Filter Switch
This con
Þ
guration setting tells the control that a Dirty
Filter Switch is installed and that the control is to
mon i tor the
Dirty Filter Switch
input and respond as
spec i
Þ
ed to the input status.
ASCD Override
This is not an option parameter but rather a one-time
command issued on the OptiLogic Control Center.
When this command is issued, the control will read all
compressor Anti Short Cycle Delays. If any of them
are loaded with more than 30 seconds, the control will
load 30 seconds in them.
RUN TEST
When this command is issued the control will:
• Shut down the unit (if it is running).
• Turn ON the supply air fan.
• Start a run test sequence.
During the RUN TEST sequence, each compressor
will be run for three minutes and then shut down.
After a 30 second delay, the next compressor will be
started.
The Primary Unit Controller will the turn ON each
heading step, one at a time. Each heating step will run
for three minutes and then shut down. After a one-
minute delay, the next heating step will be started.